Cells Championship!!

Observing a cell under a microscope, you notice it has a rigid structure and chloroplasts. What type of cell is being observed?

• Plant cell

• Animal cell

Answer explanation

The cell has a rigid structure and chloroplasts, indicating it is a plant cell. Animal cells do not have chloroplasts.

Tags

NGSS.MS-LS1-1

Where is the nucleus located in a cell?

• In the center of the cell. It controls the cells growth

• Underneath the cell wall. It allows water and nutrients to pass into the cell and waste to pass out of the cell.

• Surrounding the cell. It helps protect the cell

• All throughout the cell. It is a jelly-like substance that holds all of the organelles in their place.

Answer explanation

The nucleus is located in the center of the cell and controls the cell's growth, making it the correct choice.

Tags

NGSS.MS-LS1-2

Which of the following are made up of cells? (Choose all that apply)

• Lead from a pencil

• A leaf from a tree

• A grain of salt

• The wing from a bee

Answer explanation

Cells are the basic structural and functional units of living organisms. A leaf from a tree and the wing from a bee are made up of cells.

Tags

NGSS.MS-LS1-1

All of these microorganisms are harmful EXCEPT

• Fungi and bacteria that decompose dead plants and animals in a forest

• Bacteria living on uncooked meat in a refrigerator

• Mold growing on an ear of corn in a damp basement

• Parasites living in mosquitos in a swamp

Answer explanation

The correct choice is fungi and bacteria that decompose dead plants and animals in a forest because they play a vital role in the ecosystem by breaking down organic matter.

Which of the following are ONLY found in plant cells?

• Chloroplasts

• Cell membranes

• cytoplasm

• nucleus

Answer explanation

Chloroplasts are ONLY found in plant cells, making them the correct choice among the options provided.

In a botanical garden, a botanist is comparing cells under a microscope. What are the two organelles that she would find in a plant cell that are not present in an animal cell?

• cytoplasm

• cell wall

• nucleus

• chloroplasts

Answer explanation

The two organelles that are present in a plant cell but not in an animal cell are the cell wall and chloroplasts. These organelles provide structural support and are responsible for photosynthesis in plants.

Four students in Mrs. Sterling's class make the following observations.  Choose which student is correct

• Shelby says that all microorganisms are found in the ocean.  Some are helpful, but some are harmful.  It's best to shower after swimming at the beach.

• Garry says that all microorganisms are harmful.  This is why we must get vaccinations and antibiotics from the doctor.

• Ireland says that some microorganims are helpful and some are harmful.  The best way to protect ourselves from harmful microbes is to wash our hands with soap and water.

• Jonathan says it's impossible to become sick from bacteria.  Only viruses and fungi can make a person sick.  Make sure to sneeze in your elbow to prevent the spread of germs.

Answer explanation

Ireland says that some microorganisms are helpful and some are harmful. The best way to protect ourselves from harmful microbes is to wash our hands with soap and water.

Four of Mrs. Sterling's students go to Six Flags.  Two become sick.  Choose which answer gives the best evidence as to why the students became sick.

• Isabela and Sauzaas become sick because they do not like the dressed up characters at Six Flags.  

• James and and Salwa become sick because they did not have enough money to buy a souvenir. 

• Sauzaas and James become sick because they ingested some chicken at the food stand that had bacteria on it.  

• Isabella and Salwa become sick because they washed their hands too many times while at the park.

Answer explanation

Sauzaas and James become sick because they ingested some chicken at the food stand that had bacteria on it.

Which of the following is an example of an instinct that helps an animal survive?

• a skunk spraying a smelly mist for protection

• a raccoon learning to cross the road

• a dog fetching a ball

• a human riding a bicycle

Answer explanation

The skunk spraying a smelly mist for protection is an example of an instinct that helps an animal survive by deterring predators.

Animals inherit certain characteristics, such as fur color. What is a characteristic that plants inherit?

• flower color

• number of legs

• number of arms

• growing away from light

Answer explanation

Plants inherit characteristics like flower color, not number of legs or arms. Growing away from light is a plant's response to stimuli, not an inherited trait.

Tags

NGSS.MS-LS3-2

NGSS.MS-LS4-4